F-3500 Insertion Electromagnetic Flow Meter

ONICON’s F-3500 Series Insertion Electromagnetic Flow Meters are suitable for measuring electrically conductive liquids in a wide variety of applications. Each F-3500 provides a single analog output for flow rate, a high resolution frequency output to drive peripheral devices, a scalable pulse output for totalization, and an empty pipe alarm. It is available for use in pipes ranging in size from 1¼” to 72″ in diameter. The F-3500 Insertion Electromagnetic Flow Meter features ONICON’s unique hot tap design that allows for easy insertion or removal from the pipe without the use of special tools and without disrupting flow. The low maintenance design is provided ready-to-use without the need for field programming.   The FB-3500 Electromagnetic Flow Meter is available for bi-directional flow applications. It provides an analog output for flow rate, a contact closure output to indicate flow direction and separate pulse outputs to totalize forward and reverse flow.

When provided with the thermal energy (BTU) meter option, the FT-3500 becomes a complete hydronic energy measurement system.

Typical Applications

  • Chilled water
  • Hot water
  • Domestic water
  • Condenser water
  • Municipal water

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  • Simple Installation and Commissioning –  The F-3500 Insertion Electromagnetic Flow Meter Factory configured and ready for use upon delivery.
  • Exceptional Performance & Value – the design provides cost-effective solution for accurate and reliable flow measurement in larger pipe sizes.
  • Excellent Long Term Reliability – Low maintenance, no-moving-parts flow sensing technology. It works well in difficult flow measurement applications such as open loop condenser water flow.
  • Highly Accurate Over a Wide Flow Range – Highly efficient sensor design with high accuracy and sensitivity. Particularly at low flow rates.
  • Simplified Hot Tap Insertion Design – This standard feature allows for insertion and removal by hand without a system shutdown.
  • Ideal Solution for Retrofits – The innovative hot tap adapter design allows for wet tapping pipes without interrupting flow.
  • Touch Screen Remote Display – All process data and programming functions are accessible via user friendly display. Advanced diagnostics are available to confirm wiring connections, noise detection via waveforms, and built-in verification for accurate system performance. Color coded interconnecting cabling and installation instructions are provided to ensure error-free installation.
  • Network Communication and Output – All data is reported via BACnet or MODBUS directly to the BMS/BAS via IP or RS485 connection. The FT-3500 is provided with: three (3) pulse outputs for totalization, alarm, and system status; two (2) analog outputs for energy, flow, and temperature; and one (1) frequency output for flow rate.
  • BTU (Energy) Meter Option – When ordered with the thermal energy (BTU) meter option, the FT-3500 becomes a complete thermal energy measurement system providing accurate flow, energy, and temperature data.


Catalog Sheets